AP EAPCET 08-Jul-2022 Shift 1 Paper

Be2 and Ne2 molecule does not exists as it has zero bond order. It is calculated as,
Molecular orbital electronic configuration of Be2 molecule =KK(σs)2(σ*2s)2
Thus bond order =

2−2

2

=0
Molecular orbital electronic configuration of Ne2 molecule
=KK(σ2pz)2(π2px)≃(π2pyy)2,π*(2px)2≃(π*2py)2,(σ*2pz)2
Bond order =

6−6

2

=0